1972 Citroen SM vs. 2006 BMW 630
To start off, 2006 BMW 630 is newer by 34 year(s). Which means there will be less support and parts availability for 1972 Citroen SM. In addition, the cost of maintenance, including insurance, on 1972 Citroen SM would be higher. At 2,996 cc (6 cylinders), 2006 BMW 630 is equipped with a bigger engine. In terms of performance, 2006 BMW 630 (254 HP @ 6600 RPM) has 81 more horse power than 1972 Citroen SM. (173 HP @ 5500 RPM) In normal driving conditions, 2006 BMW 630 should accelerate faster than 1972 Citroen SM. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 630 weights approximately 310 kg more than 1972 Citroen SM. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2006 BMW 630 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2006 BMW 630. However, in wet, icy, snow, or gravel driving conditions, 1972 Citroen SM, being front wheel drive (FWD), will offer much better control with better grip. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2006 BMW 630 (300 Nm @ 2500 RPM) has 63 more torque (in Nm) than 1972 Citroen SM. (237 Nm @ 4000 RPM). This means 2006 BMW 630 will have an easier job in driving up hills or pulling heavy equipment than 1972 Citroen SM.
Compare all specifications:
| 1972 Citroen SM | 2006 BMW 630 | |
| Make | Citroen | BMW |
| Model | SM | 630 |
| Year Released | 1972 | 2006 |
| Body Type | Coupe | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2669 cc | 2996 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 173 HP | 254 HP |
| Engine RPM | 5500 RPM | 6600 RPM |
| Torque | 237 Nm | 300 Nm |
| Torque RPM | 4000 RPM | 2500 RPM |
| Engine Bore Size | 87 mm | 85 mm |
| Engine Stroke Size | 75 mm | 88 mm |
| Engine Compression Ratio | 9.0:1 | 10.7:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Front | Rear |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1450 kg | 1760 kg |
| Vehicle Length | 4900 mm | 4830 mm |
| Vehicle Width | 1850 mm | 1860 mm |
| Vehicle Height | 1330 mm | 1380 mm |
| Wheelbase Size | 2960 mm | 2790 mm |
| Fuel Tank Capacity | 25 L | 70 L |
